Unknown User displayed in chats

[R0chdle]

Hi All,

Some of our employees have a list of Unknown users displayed while the "Unknown User" is an active user in AD/AAD/O365.

I picked one affected employee and reinstalled Office 365 and Teams but the issue reoccured after a while.

I've found a previous post which has not been solved from 2017 here

Does anyone has any information about this bug?

[#2 · Accepted solution]

Best you can do here is to report the problem through a support ticket. It's quite probable you will be asked to provide Teams Client Logs

[#3]

Just closed a case @ Microsoft. It seems to be a local home network issue..

End-user will contact ISP.